What a file cannot tell you matters as much as what it can. Unverified is reported as unverified, never folded into the clean count.
Repeatability
The same brief run twice produces the same file, because the definition is recorded.
Correction
Updating what has changed, wherever a current value can be established.
Feasibility counts
How many records meet your criteria, with the criteria written out so the number can be checked.
Tell us the segments you care about and we will size each one separately.